If indeed there is a wrinkle which i can not see, then i think based on their standard the card was over graded (ONLY if there is a wrinkle). The only way i can see the 7.5 is that they felt the card was a 9.5 and the wrinkle brought it down to a 7.5.
I do like the color on the 10 assuming it is not over saturated by the scan.
I would love to buy 7.5 cards that look like that any day of the week. Saves me $$$$ & the card looks just as good.
Buy the card and not the grade. That is my rule when purchasing cards.
Again, i am jealous and if you ever grow tired of the card drop me a line